An anti-drop universal testing machine

Abstract

The invention discloses an anti-drop type universal testing machine, comprising a frame, a fixture, an upper jaw piece, a lower jaw piece, a mover and a controller, the frame comprising a base, a middle cross beam, an upper cross beam and a column, two ends of the four columns are respectively fixed to the end angles of the base and the upper cross beam, the middle cross beam is located between the base and the upper cross beam and is driven by the mover to slide up and down along the column, the fixture is respectively fixed to the top surface of the base and the bottom surface of the middle cross beam, the fixture comprises clamping blocks located on the left and right sides and an adjuster driving the two clamping blocks to approach each other, dovetail grooves are arranged on adjacent sides of the clamping blocks, upper dovetail protrusions and lower dovetail protrusions are respectively arranged on the left and right sides of the upper jaw piece and the lower jaw piece, the jaw piece is not easy to fall due to machine vibration or human error operation, and the safety is effectively improved.

Description

[Technical field]

[0001] The invention relates to the technical field of universal testing machines, in particular to the technical field of an anti-drop type universal testing machine. [Background technology]

[0002] The universal testing machine is a mechanical testing machine that can perform a variety of tests such as tension, compression, and bending. The most common types are the lever pendulum type and the hydraulic pendulum type. The universal testing machine needs to be used strictly in accordance with the operating manual. First, use the left and right clamps to clamp the jaws, then fix the test piece on the jaws, and then use the moving crossbeam to drive the jaws up and down to complete the test of the test piece such as tension or compression. However, during the operation, the clamps may become loose, causing the jaws and the test pieces installed on them to fall and injure people. In addition, if an incorrect operation occurs after the test, such as not catching the jaws with your hands before releasing the clamp, it is also easy to cause safety accidents, which need to be solved urgently. [Summary of the invention]

[0003] The purpose of the present invention is to solve the problems in the prior art and to provide an anti-drop universal testing machine with a simple overall structure. The jaws are not easily dropped due to machine vibration or human error, thereby effectively improving safety.

[0004] To achieve the above-mentioned purpose, the present invention proposes an anti-drop type universal testing machine, including a frame, a fixture, an upper jaw member, a lower jaw member, a mover and a controller, the frame including a base, a middle crossbeam, an upper crossbeam and a column, the two ends of the four columns are respectively fixed to the end angles of the base and the upper crossbeam, the middle crossbeam is located between the base and the upper crossbeam and is driven by the mover to slide up and down along the column, the fixture is respectively fixed to the top surface of the base and the bottom surface of the middle crossbeam, the fixture includes clamping blocks located on the left and right sides and an adjuster for driving the two clamping blocks to approach each other, dovetail grooves are provided on adjacent sides of the clamping blocks, upper dovetail protrusions and lower dovetail protrusions are respectively provided on the left and right sides of the upper jaw member and the lower jaw member, the upper jaw member and the lower jaw member are respectively hung between the two clamping blocks of the clamp located above and below through the upper dovetail protrusion and the lower dovetail protrusion, and the clamp is loosened or tightened through the adjuster, and the controller is electrically connected to the fixture and the mover.

[0005] Preferably, an extension block is provided on the end corner of the middle cross beam, and a through hole is provided on the extension block, and the column passes through the through hole. The mover includes a motor, a screw rod and a nut, and the screw rod is rotatably fixed between the base and the upper cross beam. The motor is located in the base and the end of the output shaft is connected to the bottom end of the screw rod. The nut is threadedly fixed on the screw rod, and the side of the cross beam is fixed to the nut.

[0006] Preferably, the regulator comprises a support block, a limit block, a cylinder and an end plate, two of the support blocks are arranged on the left and right, and the two limit blocks are respectively fixed to the lower ends of adjacent surfaces of the support blocks, the adjacent surfaces of the limit blocks are inclined surfaces and the spacing of the limit blocks gradually decreases from top to bottom, the clamping block is an inverted right-angled trapezoid and the inclined surface side is slidably fixed on the limit block, the dovetail groove is located on the straight surface side of the clamping block, and a transverse groove is also provided on the adjacent side of the clamping block and above the dovetail groove, the left and right ends of the end plate extend into the transverse groove, the end of the telescopic rod of the cylinder is connected to the top surface of the end plate, the top surface of the support block of the upper clamp is fixed to the bottom surface of the middle cross beam, the cylinder of the upper clamp is located in the middle cross beam, the top surface of the support block of the lower clamp is fixed to the top surface of the base, and the cylinder of the lower clamp is located in the base.

[0007] Preferably, the end plate is in an arc shape with a center portion sunken downward.

[0008] Preferably, a notch is provided at the central lower end of the end plate, and a groove which is in communication with the bottom surface of the end plate is provided in the middle of the notch.

[0009] Preferably, the upper jaw member includes an upper clamping block, a connecting column and a C-shaped end head, the upper dovetail protrusion is located on the left and right sides of the upper clamping block, the opening of the C-shaped port is located at the bottom end, and the two ends of the connecting column are respectively fixed to the bottom surface of the upper clamping block and the top surface of the C-shaped end head.

[0010] Preferably, the lower jaw member comprises a lower clamping block and a stud, the lower dovetail protrusion is located on the left and right sides of the lower clamping block, and the stud is fixed to the top surface of the lower clamping block.

[0011] The beneficial effects of the present invention are as follows: the present invention arranges a dovetail groove on the clamping block, and arranges an upper dovetail protrusion and a lower dovetail protrusion on the upper jaw piece and the lower jaw piece respectively, so that the upper jaw piece and the lower jaw piece can be directly suspended on two clamps respectively, and then clamped or loosened with the adjuster. The overall structure is simple, and the jaw pieces are not easy to fall off due to machine vibration or human error, which effectively improves safety; the end plate is made into an arc shape with a downward depression in the center, and notches and grooves are arranged in combination to ensure smooth up and down movement of the clamping block; extension blocks with through holes are respectively arranged at the end corners of the middle beam, and the columns are arranged through the through holes to guide the middle beam, thereby effectively improving the stability of the movement of the middle beam.

[0012] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0013] Figure 1 It is a front view of an anti-drop type universal testing machine of the present invention;

[0014] Figure 2It is a left view of an anti-drop type universal testing machine of the present invention after removing the clamp, the upper jaw member and the lower jaw member;

[0015] Figure 3 It is a top view of a middle cross beam of an anti-drop type universal testing machine of the present invention;

[0016] Figure 4 It is a front view of a fixture of an anti-drop type universal testing machine of the present invention;

[0017] Figure 5 The utility model is a front view of an upper jaw member of an anti-drop type universal testing machine of the present invention.

[0018] Figure 6 The utility model is a front view of a lower jaw member of an anti-drop type universal testing machine of the present invention.

[0019] In the figure: 1-frame, 11-base, 12-middle beam, 121-extension block, 122-through hole, 13-upper beam, 14-column, 2-clamp, 21-support block, 22-limit block, 23-clamp block, 231-dovetail groove, 232-cross groove, 24-cylinder, 25-end plate, 251-notch, 252-groove, 3-upper jaw piece, 31-block, 311-upper dovetail protrusion, 32-connecting column, 33-C-type end, 331-opening, 4-lower jaw piece, 41-block, 411-lower dovetail protrusion, 42-stud, 5-mover, 51-motor, 52-screw, 53-nut, 6-controller, 7-nut. [Specific implementation method]

[0020] See also Figures 1 to 6The present invention discloses an anti-drop universal testing machine, comprising a frame 1, a fixture 2, an upper jaw member 3, a lower jaw member 4, a mover 5 and a controller 6. The frame 1 comprises a base 11, a middle crossbeam 12, an upper crossbeam 13 and a column 14. The two ends of the four columns 14 are respectively fixed to the end angles of the base 11 and the upper crossbeam 13. The middle crossbeam 12 is located between the base 11 and the upper crossbeam 13 and is driven by the mover 5 to slide up and down along the column 14. The fixture 2 is respectively fixed to the top surface of the base 11 and the bottom surface of the middle crossbeam 12. The fixture 2 comprises clamping blocks 23 located on the left and right sides and an adjuster for driving the two clamping blocks 23 to approach each other. Dovetail grooves 231 are provided on the adjacent sides of the clamping blocks 23. The upper jaw member 3 and the lower jaw member 4 An upper dovetail protrusion 311 and a lower dovetail protrusion 411 are respectively provided on the left and right sides, and the upper jaw member 3 and the lower jaw member 4 are hung between the two clamping blocks 23 of the clamp 2 located above and below through the upper dovetail protrusion 311 and the lower dovetail protrusion 411, respectively, and the loosening or tightening with the clamp 2 is achieved through the adjuster, the controller 6 is electrically connected to the clamp 2 and the mover 5, an extension block 121 is provided on the end angle of the middle cross beam 12, the extension block 121 is provided with a through hole 122, the column 14 passes through the through hole 122, the mover 5 includes a motor 51, a screw rod 52 and a nut 53, the screw rod 52 is rotatably fixed between the base 11 and the upper cross beam 13, the motor 51 is located in the base 11 and the end of the output shaft is connected to the screw rod 52 The bottom ends are connected, the nut 53 is threadedly fixed on the screw rod 52, and the side of the crossbeam 12 is fixed to the nut 53. The regulator includes a support block 21, a limit block 22, a cylinder 24 and an end plate 25. The two support blocks 21 are arranged on the left and right, and the two limit blocks 22 are respectively fixed at the lower ends of the adjacent surfaces of the support block 21. The adjacent surfaces of the limit blocks 22 are inclined surfaces and the spacing of the limit blocks 22 is gradually reduced from top to bottom. The clamping block 23 is an inverted right-angled trapezoid and the inclined surface side is slidably fixed on the limit block 22. The dovetail groove 231 is located on the straight surface side of the clamping block 23, and a transverse groove 232 is also provided on the adjacent side of the clamping block 23 and located above the dovetail groove 231. The left and right ends of the end plate 25 extend into the transverse groove 232. The telescopic The end of the rod is connected to the top surface of the end plate 25, the top surface of the support block 21 of the upper clamp 2 is fixed to the bottom surface of the middle beam 12, the cylinder 24 of the upper clamp 2 is located in the middle beam 12, the top surface of the support block 21 of the lower clamp 2 is fixed to the top surface of the base 11, and the cylinder 24 of the lower clamp 2 is located in the base 11. The end plate 25 is an arc with a downward depression in the center. A notch 251 is provided at the central lower end of the end plate 25, and a groove 252 is provided in the middle of the notch 251 that is connected to the bottom surface of the end plate 25. The upper jaw member 3 includes an upper clamping block 31, a connecting column 32 and a C-shaped end head 33. The upper dovetail protrusion 311 is located on the left and right sides of the upper clamping block 31, and the opening 331 of the C-shaped port 33 is located at the bottom.The two ends of the connecting column 32 are respectively fixed to the bottom surface of the upper clamping block 31 and the top surface of the C-shaped end 33. The lower jaw member 4 includes a lower clamping block 41 and a stud 42. The lower dovetail protrusion 411 is located on the left and right sides of the lower clamping block 41, and the stud 42 is fixed to the top surface of the lower clamping block 41.

[0021] Working process of the present invention:

[0022] First, the upper dovetail protrusion 311 is inserted into the dovetail groove 231 of the clamp 2 located above, so that the upper jaw piece 3 is suspended on the clamp 2. Next, the cylinder 24 is controlled to work, and its telescopic rod is used to push the end plate 25 to move downward, driving the clamping blocks 23 on both sides to move downward along the inclined surface of the limit block 22 respectively, so that the two clamping blocks 23 gradually approach each other during the downward movement and clamp the upper jaw piece 3. Similarly, the clamp 2 located below is clamped with the lower jaw piece 4. Subsequently, the motor 51 drives the screw rod 52 to rotate, so that the nut 53 moves downward along the screw rod 52, thereby driving the middle cross beam 12 to move downward until the stud 42 extends into the C-type end 33 along the opening 331. Next, the nut 7 to be tested is threadedly fixed on the stud 42 until the bottom surface of the nut 7 contacts the C-type end 33. Finally, the mover 5 controls the middle cross beam 12 to move upward until the nut 7 is pulled off, and the test is completed.

[0023] The present invention arranges a dovetail groove on the clamping block, and arranges an upper dovetail protrusion and a lower dovetail protrusion on the upper jaw piece and the lower jaw piece respectively, so that the upper jaw piece and the lower jaw piece can be directly suspended on two clamps respectively, and then clamped or loosened with the adjuster. The overall structure is simple, and the jaw pieces are not easy to fall off due to machine vibration or human error, which effectively improves safety; the end plate is made into an arc shape with a downward depression in the center, and notches and grooves are arranged in combination to ensure smooth up and down movement of the clamping block; extension blocks with through holes are respectively arranged at the end corners of the middle cross beam, and the columns are arranged through the through holes to guide the middle cross beam, thereby effectively improving the stability of the movement of the middle cross beam.

[0024] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. A drop-proof universal testing machine, characterized in that: The invention comprises a frame (1), a fixture (2), an upper jaw member (3), a lower jaw member (4), a mover (5) and a controller (6); the frame (1) comprises a base (11), a middle crossbeam (12), an upper crossbeam (13) and a column (14); two ends of the four columns (14) are respectively fixed to the end corners of the base (11) and the upper crossbeam (13); the middle crossbeam (12) is located between the base (11) and the upper crossbeam (13) and is driven by the mover (5) to slide up and down along the column (14); the fixture (2) is respectively fixed to the top surface of the base (11) and the bottom surface of the middle crossbeam (12); the fixture (2) comprises clamping blocks ( 23) and an adjuster for driving the two clamping blocks (23) to approach each other, the adjacent sides of the clamping blocks (23) are provided with dovetail grooves (231), the left and right sides of the upper jaw member (3) and the lower jaw member (4) are respectively provided with upper dovetail protrusions (311) and lower dovetail protrusions (411), the upper jaw member (3) and the lower jaw member (4) are respectively hung between the two clamping blocks (23) located at the upper and lower clamps (2) through the upper dovetail protrusions (311) and the lower dovetail protrusions (411) and are loosened or tightened with the clamp (2) through the adjuster, the controller (6) is electrically connected to the clamp (2) and the mover (5), and the adjuster includes a support block (2 1), a limit block (22), a cylinder (24) and an end plate (25), wherein two support blocks (21) are arranged on the left and right, and the two limit blocks (22) are respectively fixed at the lower ends of the adjacent surfaces of the support block (21), the adjacent surfaces of the limit blocks (22) are inclined surfaces, and the spacing between the limit blocks (22) is gradually reduced from top to bottom, the clamping block (23) is an inverted right-angled trapezoid, and the inclined surface side is slidably fixed on the limit block (22), the dovetail groove (231) is located on the straight surface side of the clamping block (23), and a transverse groove (232) is further provided on the adjacent side of the clamping block (23) and located above the dovetail groove (231), and the left and right ends of the end plate (25) extend into the transverse groove (232), and the cylinder (24) is provided on the left and right ends of the end plate (25) The end of the telescopic rod of the cylinder (24) is connected to the top surface of the end plate (25), the top surface of the support block (21) of the upper clamp (2) is fixed to the bottom surface of the middle cross beam (12), the cylinder (24) of the upper clamp (2) is located in the middle cross beam (12), the top surface of the support block (21) of the lower clamp (2) is fixed to the top surface of the base (11), the cylinder (24) of the lower clamp (2) is located in the base (11), the end plate (25) is an arc with a center depressed downward, a notch (251) is provided at the central lower end of the end plate (25), and a groove (252) is provided in the middle of the notch (251) and is connected to the bottom surface of the end plate (25).

2. The anti-drop universal testing machine according to claim 1, characterized in that: An extension block (121) is provided at an end corner of the middle cross beam (12), a through hole (122) is provided on the extension block (121), and the column (14) passes through the through hole (122). The mover (5) comprises a motor (51), a screw rod (52) and a nut (53), the screw rod (52) is rotatably fixed between the base (11) and the upper cross beam (13), the motor (51) is located in the base (11) and the end of the output shaft is connected to the bottom end of the screw rod (52), the nut (53) is threadedly fixed on the screw rod (52), and the side surface of the cross beam (12) is fixed to the nut (53).

3. The anti-drop universal testing machine according to claim 1, characterized in that: The upper jaw member (3) comprises an upper clamping block (31), a connecting column (32) and a C-shaped end head (33); the upper dovetail protrusion (311) is located on the left and right sides of the upper clamping block (31); the opening (331) of the C-shaped end head (33) is located at the bottom end; and the two ends of the connecting column (32) are respectively fixed to the bottom surface of the upper clamping block (31) and the top surface of the C-shaped end head (33).

4. The anti-drop universal testing machine according to claim 1, characterized in that: The lower jaw member (4) comprises a lower clamping block (41) and a stud (42), the lower dovetail protrusion (411) is located on the left and right sides of the lower clamping block (41), and the stud (42) is fixed on the top surface of the lower clamping block (41).

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